Abstract
Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic-field measurements due to their wide dynamic range and high sensitivity. The use of linearly polarized pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarization of transmitted light. We demonstrate experimentally that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarization signal contain sufficient information to measure the static-magnetic-field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector-field tracking under varying static-field orientations and show that the static-field magnitude and orientation may be observed simultaneously, with an experimentally realized resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.
| Language | English |
|---|---|
| Article number | 034035 |
| Number of pages | 8 |
| Journal | Physical Review Applied |
| Volume | 10 |
| Issue number | 3 |
| Early online date | 18 Sep 2018 |
| DOIs | |
| Publication status | E-pub ahead of print - 18 Sep 2018 |
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Keywords
- optical pumping
- polarization of light
- magnetometry
Cite this
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Vector magnetometry exploiting phase-geometry effects in a double-resonance alignment magnetometer. / Ingleby, Stuart J.; O'Dwyer, Carolyn; Griffin, Paul F.; Arnold, Aidan S.; Riis, Erling.
In: Physical Review Applied, Vol. 10, No. 3, 034035, 18.09.2018.Research output: Contribution to journal › Article
TY - JOUR
T1 - Vector magnetometry exploiting phase-geometry effects in a double-resonance alignment magnetometer
AU - Ingleby, Stuart J.
AU - O'Dwyer, Carolyn
AU - Griffin, Paul F.
AU - Arnold, Aidan S.
AU - Riis, Erling
PY - 2018/9/18
Y1 - 2018/9/18
N2 - Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic-field measurements due to their wide dynamic range and high sensitivity. The use of linearly polarized pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarization of transmitted light. We demonstrate experimentally that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarization signal contain sufficient information to measure the static-magnetic-field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector-field tracking under varying static-field orientations and show that the static-field magnitude and orientation may be observed simultaneously, with an experimentally realized resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.
AB - Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic-field measurements due to their wide dynamic range and high sensitivity. The use of linearly polarized pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarization of transmitted light. We demonstrate experimentally that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarization signal contain sufficient information to measure the static-magnetic-field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector-field tracking under varying static-field orientations and show that the static-field magnitude and orientation may be observed simultaneously, with an experimentally realized resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.
KW - optical pumping
KW - polarization of light
KW - magnetometry
UR - http://www.scopus.com/inward/record.url?scp=85053834138&partnerID=8YFLogxK
UR - https://arxiv.org/abs/1802.09273
U2 - 10.1103/PhysRevApplied.10.034035
DO - 10.1103/PhysRevApplied.10.034035
M3 - Article
VL - 10
JO - Physical Review Applied
T2 - Physical Review Applied
JF - Physical Review Applied
SN - 2331-7019
IS - 3
M1 - 034035
ER -